August 2007 saw a surge of new open-source software for simulating musculoskeletal movement. In addition to OpenSim 1.0 (described in the Fall 2007 issue of this magazine), FEBio arrived on the scene...

The essential elements of human fertilization are clear: sperm swim through the uterus, travel up the fallopian tube, and fertilize an egg. Not as well understood are the the nitty-gritty details of...